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<title>bool operator!=(const basic_outcome&lt;A, B, C, D&gt; &amp;) const - Boost.Outcome documentation</title>
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  <div class="titlepage"><div><div><h1 style="clear: both"><code>bool operator!=(const basic_outcome&lt;A, B, C, D&gt; &amp;) const</code></h1></div></div></div>
  <p>Returns true if this outcome does not compare equal to the other outcome. Comparison is done using <code>operator!=</code> on <code>value_type</code>, <code>error_type</code> and/or <code>exception_type</code> if the currently chosen state is the same for both outcomes, otherwise true is returned.</p>

<p><em>Requires</em>: <code>operator!=</code> must be a valid expression between <code>value_type</code> and <code>A</code>, and between <code>error_type</code> and <code>B</code>, and between <code>exception_type</code> and <code>C</code>. If <code>value_type</code> is <code>void</code>, then so must be <code>A</code>; similarly for <code>error_type</code> and <code>B</code>; similarly for <code>exception_type</code> and <code>C</code>.</p>

<p><em>Complexity</em>: Whatever the underlying <code>operator!=</code> have. Constexpr and noexcept of underlying operations is propagated.</p>

<p><em>Guarantees</em>: None.</p>


        </div><p><small>Last revised: February 01, 2019 at 15:52:57 UTC</small></p>
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